Pearl and Stone Gauge; A*F Swiss

The A*F Pearl and Stone Gauge is a light; compact and handy tool so you can hang it from your neck or from your pocket.;You can measure size or thickness of stones/pearls; just by holding it between a contact point and anvil; and pressing a knob lightly by your finger.;A division of the scale shows 01.mm and you can measure up to 20mm by this gauge.